*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
.clearfix:before,
.clearfix:after{
    content: "";
    clear: both;
    display: block;
}
a{
    text-decoration: none;
    color: #000;
}
ul li {
    list-style: none;
    width: 121px;
    margin-bottom: 10px;
}
#app{
    width: 1090px;
    margin: auto;
    -ms-text-align-last: right;
    text-align: left;
}
div ul{
    display: flex;
    flex-wrap: wrap;
}